{
  "manageEntity": {
    "action": "Save",
    "entityId": "242431412",
    "entityType": "Track",
    "nonce": "0x9b48beca3b810754979e1fd569c6d9556f8b0aa4ca9e5b7534fb62278c2ee612",
    "signature": "0x8a5087aae0b18937857939baa49f1c4d8ba2ddffe940811eb752552854a84e9f6096178b16203e0eac136352a9aba82383983647d3abf266e215faa7e8fcaf561b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}